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在Bi-Sr-Ca-Cu-O体系中合成单一的2223相比较困难。为了提高2223相的比率,我们采取Bi_(1.7)Pb_(0.4)Sr_(1.6)Ca_(2.4)Cu_(3.6)O_y的名义组分,经过810℃/36h的煅烧(中间研磨一次),对煅烧料进行研磨和压片,再经过848℃/24h的烧结,然后在空气中淬火到室温,由XRD实验证实得到的样品几乎为单一的2223相。电阻测量表明,其R_(300k)≈300Ω,T_(conset)～110K,T_(co)
It is difficult to synthesize a single 2223 in the Bi-Sr-Ca-Cu-O system. In order to increase the ratio of 2223 phase, we took the nominal composition of Bi 1.7 Pb 0.4 Sr 1.6 1.6 2.4 Cu 3.6 Oy, calcined at 810 ℃ for 36h, The material was ground and tabletted, then sintered at 848 ° C / 24h and then quenched in air to room temperature. The XRD experiment confirmed that the resulting sample was almost a single 2223 phase. The resistance measurement shows that the R_ (300k) ≈300Ω, T_ (conset) ~ 110K, T_ (co)